“Understand, I promise nothing,” said Frank, who scarcely relished Staarbrucker’s persistency. “I’ll see you again to-night.”

After dinner that evening, the two men met again. Frank reopened the topic, which had meantime been engrossing Staarbrucker’s thoughts to the exclusion of all else.

Frank at once declared his intention of going to see the manager next day, to tell him of the find and take his advice.

Otto Staarbrucker made a gesture of intense annoyance. “You are never going to play such an infernal fool’s game as that, surely?” he burst out. “I’ve made you a liberal offer to prospect thoroughly at my own expense the place where that stone came from, on half shares. If you accept my offer, well and good. If you don’t, I shall simply tell your little story to the detective department, and see what they think of it. Think it well over. I’ll come and see you to-morrow morning, early.”

He turned on his heel, and went out of the house.

Frank had felt a little uncomfortable during Otto’s speech, but now he was angry—so indignant at the turn affairs had taken, and at the threat, idle though it was, held out to him, that he determined next day to quit the house and have done with the man altogether. He had never liked him. True, there was Nina. Nina—so utterly different from her brother. He should be sorry indeed to leave her. She had a very warm corner in his heart. He would miss the pleasant evenings spent in her company. What should he do without her merry camaraderie, her kindly, unselfish ways, the near presence of her bewitching face, and her evident preference for his company? At that moment Nina entered the room. Frank looked, as he felt, embarrassed, and the girl saw it at once.

“What’s the matter, Frank? You ought to look happy with that eight hundred pound diamond of yours; yet you don’t. Aren’t things going as you like, or what is it?”

“No,” answered Frank, reddening, “things are not going quite right. Your brother has made me a proposition, which I don’t quite see in his light, and we’ve rather fallen out about it. However, my tiff with Otto need make no difference between you and me. We haven’t quarrelled, and I hope you won’t let our old friendship be broken on that account.”

“Indeed, no,” returned Nina, “why should it? But I shall see Otto and talk to him; I can’t have you two falling out about a wretched diamond, even although it is a big one. Since you came here, things have been so much pleasanter, and,”—the girl paused, and a flush came to her face, “well, we can’t afford to quarrel, can we? Friends—real friends, I mean—are none too plentiful in Kimberley.”

Nina spoke with a good deal of embarrassment for her, and a good deal of feeling, and she looked so sweet, such an air of tenderness and of sympathy shone in her eyes, that Frank was visibly touched.